Her death was the occasion of mass riots.
她的逝世引发了大规模的骚乱。
The city is an extraordinary processor of mass and energy and has its own metabolism.
城市是质量和能量的特殊处理器，有着自己的新陈代谢。
It was a time of mass unemployment.
当时有大批人失业。
The UK, uniquely, has not had to face the problem of mass unemployment.
唯有英国无须面对大量失业的问题。
This can cause a kind of mass feeding frenzy.
这可能会导致一种大规模的疯狂进食。
It will remind you of center of mass and all that.
它将来会让你想起质心等等。
This is the story of wildlife conservation in the age of mass extinction.
这是个关于在大规模的物种灭绝时代保护野生动物的故事。
For others, a combination of mass transit and private transportation may be desirable.
对另一些人来说，公共交通和私人交通相结合是可取的。
Now they lead in the manufacture of weapons of mass destruction.
现在他们在制造大规模杀人武器方面领先。
物体的中心在这里。
看到质量重心了吧？
Is it some kind of mass psychoses?
这是否是一种大众的心理疾病？
True, Osama is guilty of mass murder.
对的，欧萨玛是大量谋杀案的罪犯。
Where is the center of mass of this system?
这系统的重心何在？
And so you can calculate the center of mass.
你可以计算质量中心。
For the pendulum, center of mass is here.
对摆来说，重心在这里。
The center of mass must be somewhere here.
重心肯定是这里某处。
Center of mass below the suspension point.
重心在悬挂点下面。
We write it subject to conservation of mass.
要服从质量守恒定律。
We thought there were weapons of mass destruction.
我们以为那儿有大规模杀伤性武器。
The Requiem mass is a particular kind of mass.
安魂弥撒曲是弥撒曲中特殊的一种
So this is the velocity of the center of mass.
这就是重心速度。
You're not moving, you're in the center of mass.
你没有移动，你处于质量重心。
The threat of mass mortality often never materialises.
大规模死亡的威胁从没突然出现。
And let the center of mass be, for instance, here.
让物体的中心，比方说，在这里。
How could be a valuable object in age of mass production?
在大规模生产的年代，这该是一个多么珍贵的物品！
In particular, we have seen the notion of center of mass.
特别地，我们学过质心的概念。
It's not a food of mass consumption, like noodles or rice.
这可不像面条或大米一样，是大众能消费的食物。
How do we calculate the velocity of the center of mass?
我们怎样计算，重心速度呢？
And now comes another unique property of the center of mass.
它还有一个特性，质量重心的特性。
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